VCMD HowTo

VCMD one-liners (by Bertl)

• create a non virtualized init task

vcmd -i 100 -BC ctx_create .flagword=^34^33^32 -- vcmd -i -1 -BC set_cflags .mask=^33 -- cat /proc/self/status

• create a virtualized init task

vcmd -i 100 -BC ctx_create .flagword=^34^33^32^4 -- vcmd -i -1 -BC set_cflags .mask=^33 -- cat /proc/self/status

• set context 100 dentry (hard) limit (22) to 4000

vcmd -i 100 -BC set_rlimit .id=22 .maximum=4000

• start a cpuhog with sched_hard (supposed to get 25% by default)

vcmd -i 100 -BC ctx_create .flagword=^34^33^32^8 -- cpuhog

• translate switch debugging to readable names

dmesg | while read vxd vc vcmd LINE; do test "$vxd $vc" != "vxD: vc:" && continue; vcmd=${vcmd/,/}; text=`vcmd -d -C "$vcmd" | head -n 1 | sed 's/://'`; test "$text" = "unknown VCMD" && text="$vcmd"; printf "%-30s %s\n" "$text" "$LINE"; done